[蓝桥杯]试题 基础练习 FJ的字符串

#include<iostream>

using namespace std;

int main()
{
     
	int n;
	cin>>n;
	string res = "";
	char ch;
	for(int i = 0; i < n; i++)
	{
     
		ch = 'A' + i; 
		res += ch + res;
	} 
	cout<<res;
	return 0;
}